Sarah Palin declared on Thursday that the legitimacy of President Obama's birth certificate is "rightfully" an issue with the American public, and that it is "fair game" for politicians to question Obama's citizenship.

The comments came during an interview with conservative radio host Rusty Humphries, who asked Palin whether she planned to "make the birth certificate an issue" if she runs for president in 2012.

"I think the public rightfully is still making it an issue," Palin said. "I don't have a problem with that. I don't know if I would have to bother to make it an issue, because I think that members of the electorate still want answers."

Humphries -- who began the interview with a rendition of the song "Sarah, Queen Of The Wild Frontier" -- followed up: "Do you think it's a fair question to be looking at?"

"I think it's a fair question just like I think past associations and past voting records. All of that is fair game," Palin responded, adding that "the McCain-Palin campaign didn't do a good enough job in that area. We didn't call out Obama and some of his associates on their records and what their beliefs were, and perhaps what their future plans were, and I don't think that was fair to voters to not have done our job as candidates and a campaign to bring to light a lot of things that now we're seeing manifest in the administration."

Palin later referenced "that weird conspiracy theory freaky thing that people talk about that Trig isn't my real son, and a lot of people that went 'Well, you need to produce his birth certificate, you need to prove that he's your kid,' which we have done, but yeah, so maybe we can reverse that, and use the same [inaudible] thinking on the other one."

UPDATE: At 1:16 AM ET, Palin posted the following on her Facebook page:

Stupid Conspiracies

Voters have every right to ask candidates for information if they so choose. I've pointed out that it was seemingly fair game during the 2008 election for many on the left to badger my doctor and lawyer for proof that Trig is in fact my child. Conspiracy-minded reporters and voters had a right to ask... which they have repeatedly. But at no point - not during the campaign, and not during recent interviews - have I asked the president to produce his birth certificate or suggested that he was not born in the United States.

In June, the Obama campaign released a digitally scanned image of his birth certificate to quell speculative charges that he might not be a natural-born citizen. But the image prompted more blog-based skepticism about the document's authenticity. And recently, author Jerome Corsi, whose book attacks Obama, said in a TV interview that the birth certificate the campaign has is "fake."

We beg to differ. FactCheck.org staffers have now seen, touched, examined and photographed the original birth certificate. We conclude that it meets all of the requirements from the State Department for proving U.S. citizenship. Claims that the document lacks a raised seal or a signature are false. We have posted high-resolution photographs of the document as "supporting documents" to this article. Our conclusion: Obama was born in the U.S.A. just as he has always said.